package chapter04.Example15_17;

public class Example17 {
    public static void main(String[] args) {
        Animal a1 = new Dog();
        System.out.println("动物类 a1 = new Dog():"+(a1 instanceof  Animal));
        System.out.println("动物类 a1 = new Dog():"+(a1 instanceof  Dog));
        Animal a2 = new Animal();
        System.out.println("动物类 a2 = new Animal():"+(a2 instanceof Animal));
        System.out.println("动物类 a2 = new Animal():"+(a2 instanceof Dog));
    }
}
